Bearing and gear pulling device



Sept. 7 1926. 1,599,332

E. M. KERR BEARING AND GEAR PULLING nEvIn I Filed May 2, 1925 & 73.72

INVENTOR.

EHR L. m. KERR mym I ATTORNEY Patented Sept. 7, 1926. v

EARL MORTIMER KEBR, or wnrrrma, CALIFORNIA. I I

BEARING Ann EAR PU LLI G DEVICE f Application filed May This inventionrelates to improvements in bearing and gear pulllng devices. Theprincipal ob ect, of this inventlon is to produce 7 a' simple tool whichmay be employed for the pulling of gear and bearing members either onthe'inner race or outer'race Y 1 Another object is to produce a deviceof this character which is strong, and simple to operate.

An additional object of this invention is to produce a tool of thischaracter .which may be readily transported and one which will notmutilate the object being drawn.

Other objects and advantages willbe apparent during'theoourse ofthefollowing description. I I

In the accompanying drawings forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same, I

Figure I is a horizontal cross section of one form of my device adaptedto pull gears,

Figure II is a similar view-of a modified form of my device having jawsadapted to pull the outside race of a ball bearing, and 1 i.

Figure III is a similar view showing my device having jaws adapted topull the inner race of a ball-bearing.

In automobile construction it is often necessary to remove small gears,such as are on magnetos which have been driven upon their shafts and mayhave become tight through corrosion. I have, therefore, found that byemploying a device, such as illus-' trated in this application, I maydraw these gears without mutilating the same and that by employing thesame tool it is. possible to draw the inner and outer races of aballbearing without mutilating them.

In the accompanying drawings wherein for the purpose of illustration isshown a preferred example of my invention, the numeral 5 designates ablock having a bore 6 therethrough within which is positioned a screw 7.One end of this block has a re duced portion 8 having its surface formedupon an are as shown at 9, and further provided with a groove 11 withinwhich the bent ends of the removable jaws are positioned,

Referring to Figure I, it will be noted that a ring12 is threadedlyengaged as at 13 with the block 5. This ring has'an inturned flange itwhich is provided with a 1 925. Sa r No. 27,555.

PATENT] OFFICE.

lip16ij .17 and 18 have shown two "jawsfeach carrying an inturned flangeIt s, of course, understood that there are four'of these aws in eachset.

'60 The constructionillustrated in Figure II" is similar to that justdescribed, with the exthe screw 7 Each of these jaws'22 is furtherprovided with outwardly extending tapered edges 30, which are adapteditoen-' gage the outer race of a roller bearing ception that the ring'12 isprovided with an i farcuate face 21, which engages thejawsy22, These aws22 are provided with aninclined face 23 adapted to contact the inclinedfaceof aplug2 l havinga tip 26 and a socket 27,]whichis adapted to'fitover the end of The form shown in Figure III in construe V tion 1sidentical, with the exception that the.

jaws 28 are tapered as shown at 29 and "1 adapted to receive a r ng 31.These jaws are providedqwith an inturned flange as shown at 32. V g

The manner of operating my device is as follows: Y

Assuming that the form shown in Figure I is being employed, the screw 7*is backed out of the block 5 a suflicient distance to permit the jaws 17and 18 to be placed over a gearor like object, after whichthe ring 12 isscrewed outwardly so that the lip 9 and inturned flange 14 will engagethe ends of the jaws and prevent them from changing theiradjusted posi-.

tion. By now screwing inwardly on the screw 7 pressure will be broughtto bear on theend of the shaft carrying the gear, to be removed. As thescrew moves, in forcing the jaws in the opposite direction the gear willbe forcibly drawn from the shaft.

In the form shown in Figure II, the action is similar with the exceptionthat the screw 7 is moved a sufficient distance to permit the 1 plug 24;to assume the position shown in this figure, within the outer ballracein such a manner as to cause the tapered edge 30 to pass behind the raceand as the screw 7 is again moved inwardly the inclined surface 23 willcause the jaws to move outwardly against the ball race.

By giving a slight blow with a hammer upon the block 5, or the tip 26,the ball race'will be withdrawn from its position. Inthe form shown inFigure III the action is identical with the exception that the jawsengage the inner race commonly secured to after which the jaws areinserted no N the shaft a'nd are prevented from spreading by theemployment of a ring 31 which moves the inclined surface of the jaws21;By"

causing the screw 7: to .engagezthgend-of the shaft on which the bearingis mounted,

a removal of the same will be effected inan resorted I towithoritdepartingfrom the spiritof the invention or the-scope of thesubjoined claims. I

Having thus ,des'cribedamy invention, I clainu-s .1. In a device ofthe-character described,

a block-having a bore formed; therein, a screw -pos1t1oned-withrn isaid} bore, 7 said 7 block having --a, reduced 1 end, said -:reducedend; being --formed @upon' an arc, a groove. formed in said reduced end,a plurality of jaws havingbent ends adapted to engage said; groove, 1 aring =threaded1y-- secured "on sald blook, :an" lnturned; flangelformedon said ring, said =flange2engaging the outer surface or" said jaws at apoint adjacent their engagement with said groove, each of said jawsShaving a work engaging rim, and means for maintaining said workengaging rim in contact withthe work to be executed.

2. In a device of the character described,

a block having'a bore formed therein, a

screw positioned within said bore, said block having a reduced end, saidreduced end being formed, upon an arc,la groove formed in said reducedend, a plurality of jaws having bent ends adaptedto engage said groove,a ring threadedlysecured on said" block, "an inturned flange formed onsaid ring, said flange engaging the outer'surface of said jaws at apoint-adjacent their jaws having a work engaging riin,-a plug adaptedto. be positioned vbetweensaidjaw's,

saidflplughaving an inclined surface, for

engagement with said groove, each of'said the purpose of expandingsaidjaws when; forced away from said block by said screw.

In testimony whereof Ilaffix my signature.

V EARL MORTIMER KERR

